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How to Add, Change, and Reprogram a Mazda 3 Spare Key

Whether you dropped your key fob on the floor or it simply stopped working, it's recommended to keep a spare key handy. This article will go over everything you must be aware of when adding, changing, or changing the programming of your mazda car key 3 key fobs.

A word of caution Certain keys need to be programmed by a locksmith professional or dealer, while others do not. Make sure you use only official mazda Premacy Key replacements to replace your key fob.

How to add a spare key

If you're unable to receive a spare key from the dealership when you purchase your Mazda 3 or accidentally break your current key but don't worry, there's still an option to get another key. You'll need the flathead screwdriver, as well as a CR2025 new battery. Once you've got these items, it is time to open the key fob. First find the auxiliary key release button. The button is on the underside of the metal part. It's easy to find. The back cover should come off as soon as you press the button. Next, insert the screwdriver's head into the notch or spacing at the top of the metal component and pry it off.

Once the auxiliary key is removed, insert your new mazda key or spare key into the slot. Set the ignition to ON, and wait for about five seconds before turning it to OFF. This will add the new information on the key to the system and allow it to start your car in the future.

It's important to note that you can only program up to three keys for your Mazda 3. You don't want to use more than two key fobs to start your vehicle. This is a security measure to prevent unauthorized users from activating your keys and launching your car.

How do I reprogram a spare key?

It's a smart idea be aware of how to reprogram a spare key in the event that the original key is lost or stolen. This will stop unauthorized persons from abusing your vehicle and re-starting it. This should work with any Mazda. You will require two keys that work to begin the reprogramming process. If you don't have two working keys, you'll need take your vehicle to the dealership to have it done.

Begin by getting in your driver's seat and shutting the door, excluding for the one that's opened. Place the first working key into the slot, and then set the ignition to the ON position. Take five seconds before removing the key. Repeat with the second key.

After you've programmed your new key, you'll have three working keys that you can use to start your vehicle in the future. Test each key to be sure that they're operating correctly before throwing them away.

You should think about purchasing a spare Mazda 3 remote, especially in cases where your car is prone to problems. You can buy one online or at a local automotive store. Make sure you look up reviews before you purchase so that you don't get a key fob which isn't compatible with your vehicle.

How do I change the battery on a spare key

There's nothing worse than finding that the battery for your key fob has gone out and you're not able to unlock your vehicle. It's a good thing that it's simple to replace the battery and save yourself some money at the dealer.

Press the auxiliary key button on the back of the keyfob. This will take out the metal key that is used as an auxiliary key, and expose two slots on the sides of the case. The flathead should be inserted into one of these slots, and then gently pull the two halves apart. When the battery is completely exposed, remove it and set aside the case in a place where you will not forget it.

Before you begin, be sure you have a new replacement battery. You can purchase them in any store that sells batteries or mazda Premacy Key at an Mazda dealer close to Winter Garden. Choosing the right battery will ensure that your key fob works properly.

Next, put the new battery in the correct place and replace the cap of the battery. Be careful not to scratch the rubber ring on which the battery rests. The two halves should be pressed together until you hear the click.

How to Reset the Keyless Entry System

The key fob on your mazda car key 3 is not only an added convenience, but it's also an important security feature. The car won't start if the key is stolen or lost even if you have a spare fob. This is because the key fob needs to be reprogrammed at the dealership in order to work once more. It's a difficult and costly process. Therefore, it's best to learn how you can reset the system.

Disconnect the battery from the system for 15 minutes. This will eliminate any remaining electrical current from the computer on board. Then, disconnect the LF-ECU connector and the demand switch connectors. Check continuity between the following terminals.

To program a new key, or a spare, insert it into the slot and set the ignition to ON. Turn off the ignition after about five seconds. The information from the key will be added to your vehicle's computer and the new fob will be able start your vehicle in the future. You can program as many fobs as want, but only one should be used at any given time. This prevents unauthorized people from copying the key and gaining access to your car. You can purchase a brand new key fob online, but you'll still need to visit an authorized locksmith or dealer to have it cut and programmed.